These patches extract and enhance the bitfield support in the register macro and introduces a new macro called bitstruct which allows to define Rust structures with bitfields. This is extremely useful as it allows clean Rust structure definitions without requiring explicit masks and shifts.
See [1] for an example of code I am working on. [1] https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/patch/?id=76797b31facae8f1a1be139412c78568df1da9f3 v1 of the patches is at: https://lore.kernel.org/all/20250824135954.2243774-1-joelagn...@nvidia.com/ v1->v2: * Use build_assert in bitstruct * Split move and enhance patches for easier review * Move out of Nova into kernel crate for other drivers like Tyr which will use. * Miscellaneous cosmetic improvements. Joel Fernandes (4): nova-core: bitstruct: Move bitfield-specific code from register! into new macro nova-core: bitstruct: Add support for different storage widths nova-core: bitstruct: Add support for custom visiblity rust: Move register and bitstruct macros out of Nova drivers/gpu/nova-core/falcon.rs | 2 +- drivers/gpu/nova-core/falcon/gsp.rs | 3 +- drivers/gpu/nova-core/falcon/sec2.rs | 2 +- drivers/gpu/nova-core/regs.rs | 5 +- rust/kernel/bitstruct.rs | 281 +++++++++++++++ rust/kernel/lib.rs | 2 + rust/kernel/prelude.rs | 2 + .../regs/macros.rs => rust/kernel/register.rs | 339 +++--------------- 8 files changed, 347 insertions(+), 289 deletions(-) create mode 100644 rust/kernel/bitstruct.rs rename drivers/gpu/nova-core/regs/macros.rs => rust/kernel/register.rs (70%) -- 2.34.1
